The week in pictures: 11 May 2012

A man shows off a knotweed root in the shape of a person on the streets of Xuchang in central China's Henan Province. Kong Lingfa says he bought the root from a peasant while passing through the Shengnongjia Mountains. The 30cm long root looks like a male body, complete with head, face, arms, legs, penis and bottom.Picture: Quirky China News / Rex Features